1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3202M AEROSPACE MATERIAL SPECIFICATION AMS3202 REV. M Issued 1943-04 Revised 2009-07 Super
5、seding AMS3202L Butadiene Acrylonitrile (NBR) Rubber Dry Heat Resistant 55 - 65 RATIONALE AMS3202M results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes.
6、1.2 Application These products have been typically used for parts, such as packings, bushings, grommets, and seals, requiring resistance to dry heat, but usage is not limited to such applications. Each application should be considered individually. 1.3 Safety - Hazardous Materials While the material
7、s, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and prope
8、r use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS 2.1 The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent speci
9、fied herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.2 SAE Publications Availab
10、le from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products SAE AMS3202M Page 2 of 6 2.3 ASTM Publica
11、tions Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 395 Rubber Property - Compression Set ASTM D 412 Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 471 Rubber Property - Effect of Li
12、quids ASTM D 792 Rubber Property - Specific Gravity ASTM D 865 Rubber - Deterioration by Heating in Air (Test Tube Enclosure) ASTM D 1149 Rubber Property - Deterioration - Surface Ozone Cracking in a Chamber (Flat Specimens) ASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Co
13、ated Fabrics ASTM D 2240 Rubber Property - Durometer Hardness 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a compound, based on an acrylonitrile-butadiene (NBR) elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Properties The product shall conform to the followin
14、g requirements in Table 1; 3.2.8 shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable: TABLE 1 INITIAL TEST REQUIREMENTS Property Requirement Test Method 3.2.1 Hardness, Durometer “A” or equivalent 60 5 ASTM D 2240 3.2.2 Tensile Strength, m
15、in 1500 psi (10.3 MPa) ASTM D 412, Die B or C 3.2.3 Elongation, min 250% ASTM D 412, Die B or C 3.2.4 Specific Gravity Preproduction Value 0.02 ASTM D 792 (Hydrostatic Method) 3.2.5 Oil Resistance ASTM D 471 IRM 903 oil (See 8.4) Temperature: 212 F 2 (100 C 1) 3.2.5.1 Hardness Change, Durometer “A”
16、or equivalent -15 to +10 Time: 70 hours 0.5 3.2.5.2 Tensile Strength Change, max -50% 3.2.5.3 Elongation Change, max -40% 3.2.5.4 Volume Change -10 to +50% 3.2.5.5 Decomposition None 3.2.5.6 Surface Tackiness None 3.2.6 Dry Heat Resistance ASTM D 865 Temperature: 302 F 5 (150 C 3) 3.2.6.1 Hardness C
17、hange, Durometer “A” or equivalent 0 to +20 Time: 70 hours 0.5 3.2.6.2 Tensile Strength Change, max 3.2.6.2.1 For parts other than extrusions -60% 3.2.6.2.2 For extruded parts -70% 3.2.6.3 Elongation Change, max SAE AMS3202M Page 3 of 6 TABLE 1 INITIAL TEST REQUIREMENTS (CONTINUED) Property Requirem
18、ent Test Method 3.2.6.3.1 For parts other than extrusions 70% 3.2.6.3.2 For extruded parts -85% 3.2.6.4 Surface Hardening None 3.2.6.5 Bend (flat) No cracking or checking 3.2.7 Compression Set Percent of Original Deflection, max 50 ASTM D 395 Method B Temperature: 212 F 2 (100 C 1) Time: 70 hours 0.
19、5 3.2.8 Low-Temperature Resistance 3.2.8.1 Brittleness Pass ASTM D 2137 Method A Temperature: -40 F 1 (-40 C 2) 3.3 Weathering The product shall show no evidence of cracking when tested in accordance with ASTM D 1149 for 168 hours 0.5 at 40 C 1 (104 F 2). Test specimens shall be prepared and mounted
20、 in accordance with ASTM D 518, Method B. 3.4 Dimensions and Tolerances Dimensions and tolerances shall be as specified in the parts standard, drawing or purchase document. If not specified, shall conform to all applicable requirements of AMS2279 . 3.5 Toxicological Formulations The material shall h
21、ave no adverse effects on the health of personnel when used for its intended purpose in accordance with manufacturers instructions and with appropriate handling procedures. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manufacturer of the product shall be responsible for perf
22、ormance of all required tests. Purchaser reserves the right to sample and perform any testing deemed necessary to ensure that the product conforms to the AMS requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Requirements shown in Table 2 are acceptance tests and shall be performed on
23、each lot: TABLE 2 - ACCEPTANCE TEST REQUIREMENTS Requirements Paragraph Hardness, as received 3.2.1 Tensile Strength, as received 3.2.2 Elongation, as received 3.2.3 Specific Gravity 3.2.4 Volume Change in oil 3.2.5.4 Compression Set 3.2.7 Tolerances 3.4 SAE AMS3202M Page 4 of 6 4.2.1.1 Lot A quanti
24、ty of one size of product processed and packaged as one production entity from a batch 4.2.1.2 Batch The quantity of compound run through a mill or mixer at one time. 4.2.1.3 Random Sampling The method shall be as specified in the parts standard, drawing or purchase document. If not specified, produ
25、ct shall be taken at random from each lot to perform all the required acceptance tests. The number of test iterations for each requirement shall be specified in the applicable test procedure. 4.2.1.4 Sample shall be from a production batch/lot 4.2.2 Preproduction Tests All technical requirements are
26、 preproduction tests and shall be performed prior to or on the initial shipment of the product by the manufacturer, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing 4.3.1 For Accepta
27、nce Tests Sufficient product shall be taken at random from each lot to perform all required tests. The number of determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three except as specified in 4.3.1.4. 4.3.1.1 If spe
28、cimens cannot be prepared from the product, ASTM test specimens prepared from the same batch and state of cure shall be used. When the product supplied is an extrusion of such shape that suitable test specimens cannot be cut from the product, a separate flat strip test sample from the same productio
29、n lot shall be supplied upon request. This strip shall be prepared from tubing 1.000 inch 0.063 (25.40 mm 1.60) in OD by 0.075 inch 0.008 (1.90 mm 0.20) in wall thickness, mechanically slit and flattened into a strip while being extruded, and cured in the same manner as production product. When the
30、product is a molded shape from which test specimens cannot be cut, a slab 6 inches (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick molded from the same batch of compound shall be supplied upon request. 4.4 Approval 4.4.1 Sample product shall be approved by the purchaser before product for p
31、roduction use is supplied, unless such approval is waived by the purchaser. Results of the tests on production product shall be essentially equivalent to those on the approved sample. Production product made by the revised procedure shall not be shipped prior to receipt of reapproval. If necessary t
32、o make any change in parameters for the process control factors, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and when requested, sample product. 4.4.2 Manufacturer shall use ingredients, manufacturing procedures, processes, and method
33、s of inspection on production product which are essentially the same as those used on the approved sample. SAE AMS3202M Page 5 of 6 4.4.2.1 Control factors for producing products include, but are not limited to, the following: Compound ingredients and proportions thereof within established limits Se
34、quence of mixing compound ingredients Type of mixing equipment Method and equipment for preparing preforms Basic molding procedure (compression, transfer, injection) Curing time and pressure; variations of 10% are permissible Finishing methods Methods of inspection 4.4.2.2 Any of the above process c
35、ontrol factors for which parameters are considered proprietary by the manufacturer may be assigned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.5 Reports The supplier of the product shall furnish with each shipment a report showing the result
36、s of tests to determine conformance to the acceptance test requirements and stating that the product conforms to the other technical requirements of this specification. This report shall include the purchase order number, lot number, AMS3202M, manufacturers identification number, part number, and qu
37、antity. 4.6 Resampling and Retesting If any specimen fails, a retesting of three additional specimens for each nonconforming specimen shall be necessary for product acceptance. The same batch/lot of product used for the failed test shall be used for retesting. Failure of any retest specimen shall be
38、 cause for rejection. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification Shall be as specified in the parts standard, drawing or purchase document. If not specified, shall be as follows: Packaging shall be in accordance with AMS2810. A lot may be pac
39、kaged in small quantities and delivered under the basic lot approval provided lot information in maintained. 5.1.1 Each package, box, and shipping container shall be permanently and legibly marked with the following when pertinent: Specification number AMS number with revision, class, grade, and typ
40、e Manufacturers identification Manufacturers product designation Batch/lot number Date of manufacturing/packaging Shelf life expiration date Storage conditions 6. ACKNOWLEDGMENT A supplier shall mention this specification number and its revision letter in all quotations and when acknowledging purcha
41、se orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. SAE AMS3202M Page 6 of 6 8. NOTES 8.1 A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical rev
42、isions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain
43、 editorial changes only. 8.2 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.3 Purchase orders should specify not less than the following: AMS3202M Quantity of product desired Method of test and acceptance standards for corrosion Special packaging, if required. 8.4 IRM 903, is available from Calumet Lubricant Company, Indianapolis, IN 317-328-5660. PREPARED BY AMS COMMITTEE “CE”
